.eslintrc

{
  // apply ’standard’ rule set, then eslint-config-prettier to "resolve" conflicts
  // to test for conflicts: `eslint --print-config .eslintrc.js | eslint-config-prettier-check`
  "extends": ["standard", "prettier", "prettier/react"],
  // use babel-eslint as parser to support advanced features, e.g. decorators
  // without it linting of some files won't work
  "parser": "babel-eslint",
  // run prettier as an ESLint rule and report differences as individual ESLint issues
  // https://github.com/prettier/eslint-plugin-prettier
  "plugins": ["prettier"],
  "rules": {
    "prettier/prettier": [
      "warn",
      {
        "semi": false,
        "singleQuote": true,
        "printWidth": 100 // 80 is default
      }
    ],

    // used for babel-eslint
    "strict": 0,

    // custom rules
    "import/no-extraneous-dependencies": "off",
    "import/extensions": "off",
    "import/no-unresolved": "off",
    "react/react-in-jsx-scope": "off",
    "react/jsx-filename-extension": "off"
  }
}